Nothing wrong with different opinions
Never stated that their was...
You sure are right with lens choice at the moment. But especially e-mount is growing rapidly and sony is doing quite some innovation. For me that means that a beginner can easily get what he needs at the moment. Probably a kit lens and maybe a telezoom. I've recommended the a6000 to my father in law and two friends, all of them are more than happy.
I'm assuming neither is into say, wildlife photography for example. I doubt either Sigma or Tamron is likely to make a 150-600mm in the Sony E mount anytime soon, not until Sony manages to dramatically increase it's market share. For now it just isn't worth it for either company to do lenses like that in an Emount, they wouldn't sell enough of them to make it worthwhile.
So yes if all you need is a lightweight camera with a kit lens, Sony's are a nice choice. But if you want to diversify.. ugh. Those lenses get expensive, quick. You don't have lower cost options, and if you want even medium length telephoto.. yikes. A 70-300 mm for the sony emount is something in the neighborhood of $1000.
Need 400mm? Double that. Need more than 400mm? Well, your buying yourself a $500+ dollar adapter plus the lens in another mount and crossing your fingers a ton hoping it will mostly work.
Shooting outside? Not the best places to change lenses on a mirrorless unless your in a relatively calm environment. Nothing protecting the sensor whatosever when you pull that lens off. Need service? Wow.. there's a serious can of worms.
So yes, if all you plan to do is family photos then the A6000 doesn't make a bad choice overall. But if your looking at getting into photography seriously, well I wouldn't choose one or recommend one under most circumstances.
Folks that have been into photography for a while might certainly choose one if they are aware of the limitations of the Sony system and realize they don't need much more than one or two lenses.
However for a beginner who is choosing his first system and wanting to do serious photography? Eh, not my first choice by a long, long shot. Better to have more options open if say he buys a camera and decides, you know what, I need a better zoom lens because I'm going to be shooting my kids soccer games. That 70-300mm sony would charge you a grand for? You can get new for Nikon for a little over $400. Buy used or something like a Tamron, you can get it even cheaper.
If he decides he needs a faster zoom because he's shooting indoors and wants say a 70-200 2.8? Sony, one choice, $2500. Nikon? Quite a few choices, ranging from something used like say the Sigma HSM I I use currently at around $400 all the way up to a brand spanking new 70-200mm VR II at around $2000. But the thing is he's got a lot of options, and he can find a ton of stuff used if he wants.
That's the difference between buying a camera, and investing in a system.
So no, for a beginner who wants to get serious about photography, Sony would probably be the last system I'd recommend. For someone who's been into photography for a while and knows what sort of equipment he/she needs? Naturally that's a completely different story. Like I said, Sony makes a fine camera body. No argument there. But on the whole, as a complete system? Eh, not so much really when compared to Canon or Nikon. If you only need the options Sony offers, well fantastic. But for somebody that is just getting serious about photography, well it's pretty difficult to know if their needs will be met by the Sony system or not.