Perhaps, but Guitar Tab is one of the great equalizers of the internet - proper notation has typically cost money to access a copy, whereas Tab could spread in .txt format, small sizes, etc. Sure, they could be off or need the song to play along with, but that's the trade-off. Lastly, though it's a personal opinion, Guitar and "proper notation" are really only needed in the same sentence when playing Classical/Orchestra, Real Jazz, or as a Pro Studio Session Musician[1] - as in, very small, elite group of players. Most will get by just growing along with the instrument over the years, for which Tab helps a lot.

[1] Great studio guitarist Glen Campbell supposedly couldn't read music at all, just went along with what he heard and made it work; Tommy Tedesco by comparison could read sheet music upside down.

I disagree; guitar has multiple fingerings for each note or chord and it's not necessarily clear which one will be the simplest to use when given regular staff notation.

There's a huge jump in the complexity of how you need to reason about translating the music to the instrument with staff notation. Tabs solve this by explicitly telling the musician what fingering to use.

Guitar players should still learn to read music because it's useful, but anyone who wants a guitarist to play their music (especially by sight) should use a notation similar to tabs, but with rhythm indicated as well. Good software to convert between the two could be generally useful, but I imagine there is a bit of nuance to what fingerings sound the best.

Early lute music was mostly written in tablature FWIW. A lot of the renaissance repertoire is still published that way. It uses letters rather than numbers to represent the frets, which takes getting used to, and puts separate timing marks above the staff.