There's definitely ways to punish very low movement. One is to just lean on top of them, drains their legs very quick. If you want to dirty with it because the guy ur boxing is playing dirty, can also post with a jab (stiff arm) when they try to bend low (whether at the waist or squatting) and drop a right hand on the side/back of their head. In boxing I'm 90% sure the rule is: if the opponent puts themselves in a position where the strike will hit them in the back of the head that is thrown normally, its their fault. Here's an example
One or 2 right hands dropped on them like that and they will be hesitant to bend low again.then of course, an opponent who is bent low will have an issue with angular movement. Step around them, get an advantageous attack position and start letting them rip.
Lomachenko (of course is a boxing god so it's hard to imitate what he does) took full advantage of this against Rigondeaux - who commonly bends below the waist at an angle to avoid punches. U ever seen one of the greatest defensive fighters get hit with 8 jabs in a row? I have, because he bent too low. Rhyme intended.
There is a rule in amateur boxing that u cannot bend below the belt line tho because of the advantage, so yeah, without knees/kicks to worry about, bending low is a good way to avoid danger depending on the opponents skill level. Only problem is, when u bend below the waist there is no way to get in a position to fire back an effective counter yourself.
Fun fact: Floyd Jr's first loss in the amateurs was due to being disqualified for bending below the belt too many times. I don't think many people know that one.