Don't pay too much attention to other people's advice - what works for them in the context of what they play may not work for you and what you're trying to do with the instrument.
We're all different, so sweeping generalisations aren't always helpful. Positive advice is often more useful than negative 'don't do that, it's wrong' admonishments.
For example, saying 'don't bite' may not be as helpful as it seems and focusing on not biting may cause other problems or distract from the things you should be concentrating on.. To me, it may be better to be aware of how much lip pressure you're using and discover for yourself how much lip pressure is optimum for each note you're playing and in so doing you may develop more precise lip control which could be more beneficial than constantly worrying that you may be biting too much.
Saxophone playing isn't an exact science and no one can define how much pressure you should apply to the reed or exactly how many millimetres of mouthpiece you should put in your mouth or any of dozens of other things. Often the language and descriptions used are vague or confusing or inaccurate, so sometimes clear explanations are difficult to find. There's a great deal of trial and error and you have to learn how to trust your own judgement and learn by experience. There's nothing wrong with seeking advice from others, but often it's necessary to try what others suggest and form your own conclusions as to whether it works for you
Watching footage of famous saxophone players you can find examples of so called 'bad habits' but clearly these things worked for them.
So it's possible that there can be more than one way of doing things and even the experts don't always know what's best.
Sometimes it's your personal musical habits that define your sound and style, whether you're Lester Young, David Sanborn or Joe Bloggs no one's ever heard of.
Exploring the instrument for yourself and finding what you can get out of it can be more rewarding than dutifully slogging away practicing stuff that you feel obliged to do because people say you should do it, or worrying that you're doing something wrong.
It's your instrument, you paid for it, now what do you want to do with it?
No one will ever master the saxophone, there are too many diverse ways of playing and too many styles and genres of music for any one person to learn