It's a choice and yes, if you want to do detailed fine art and have more control and like the hands on, sure. If the argument is space and someone is shooting RAW, they might as well shoot RAW+JPG because now you have the best of both, should you need something. What I mean is, if you want a fast and smaller image, you have the JPG. If you need to do some detailed editing, you have the RAW.
If you see that your RAW images aren't necessary, for what you do, you can always turn it off?
I don't shoot RAW, I don't use the files or need them. Personal choice for what I do.
Affinity Photo is a very capable software. I bought the first version, because I just wanted to see how I liked it. Lifetime updates, which I don't get, because they are on version 2 now. But still, it's a good one. CANVA just bought Affinity, I don't know what that means for the future or the price.
I own Photoshop Elements and that's what I use. Just in case someone doesn't need all the fancy parts of Photoshop, it's really a good tool. Most everything you can do in Photoshop, you can do with Elements, just that if you are going into deep editing and alterations, it will not be as easy, because less features are automated. Here's the point. If you are editing photos, Elements is just fine. You buy it, you own it, no CC charges.
Advantage to Adobe CC, your software will always be up to date, automatically, all the time. Features and fixes. $10 a month for Lightroom and PS, is $120 a year. I'm not sold on subscription, but how much did the software used to cost? So what if I owned it, I had to update every couple of years, which might be $350 or $700? The subscription is less, in the long run.
But being a stubborn old person, I buy Elements every few years for $79 and I'm happy. A bit of irony in all of that? I have a free photo CC subscription for LR, PS and some other photo applications, and I don't use them. I'm very happy with Elements.
After all of that, Affinity Photo does many more things than Elements, and has many more features. It edits more like LR in that you have non-destructive editing and working versions of files, that you can save Afphoto versions, and can go back. To create a JPG, or any other raster image, you export the image. Your originals are unaltered.
My vote is Affinity Photo, unless you like Adobe and only need photo editing, then Elements.
PS No one should be without Irfanview on their computer. Just for the filing and quick and easy features, renaming, resizing, basically everything except serious "photo editing". Crop, auto color, make thumbnail sheets, make websize versions, convert file types... and if necessary, quick photo editing, with minimal features. But Irfanview is an amazing tool for photographers, that's often overlooked.