I feel it depends on what you're going for. Even I admit it's much easier to solve problems of well-known programs than something more obscure. There's no denying that a lot of professional illustrators use Adobe Suite (which I already have problems with but that's for another day) so it's basically become industry standard. I don't think PS is the best for illustration as many claim it is, but for editing drawings it works out pretty well. Paint Tool SAI has been pirated to hell and back so much so that you can get a copy pretty easy and Clip usually has sales monthly, but I feel if you're going to invest in a program it should be that rather than paying almost $20 a month for something you should be able to get a one time payment for.
I do agree that pushing towards paid digital art programs isn't the best for beginners (Krita, Fire Alpaca and Medibang are good free alternatives to see if you're really interested in digital drawing) You shouldn't spend an exorbitant of money on a tablet/ drawing program when starting out.
To add onto this, telling people to buy screen tablets, even when they don't need it is AWFUL advice. Screen tablets are a pain to maintain and now you have the extra problem of worrying about your screen potentially breaking making the tablet unusable. I've been seeing art tubers shill out the Wacom One which is supposed to be an "affordable" screen tablet for beginners.
Which runs at the lovely price of $400 USD. The fact that people are trying to argue this is "affordable" is laughable to say the least when you have competitors that sell screen tablets for
half that price. Compared to the amount of money you could just spend investing in a decent monitor, I don't feel it's worth it UNLESS you have some sort of issue in that you need to see what you're drawing correctly.