Bronze players can't even execute a 1 base build with good timings so practicing a 4gate untill you get to the point where you hit the same timings as a pro player is a good way to learn but you need to realize that once you are able to hit those timings there isn't much point in continueing to do it.
Frantics 4gate right now is probably horrible since he's still in Brzone and you can get to masters 4gating every match up.
I think that learning about scoutign and stuff at the lower isn't too useful as you will be learning timings that don't make any sense are becoming irrelevent once you progress. A 4 gate at Bronze may hit at 10 mins but if someone does it well it will hit at 8mins. If you get it in your head that the 4gate hits at that timing then all your reactions will be skewed an incorrect etc. Think its definitely worth just working on mechanics and not thinking about your build/reactions untill you get within a decent timing range of gm/masters playes, maybe 30 seconds?
But of course to practice your mechanics the best you need a plan/build which is why I think cheese is a great way to learn because you have a plan but you don't need to react to anything - can just purely work on your mechanics for executing the cheese to optimal timings... You can also slowly increase the difficulty of the cheese you execute to keep pushing your mechanics, do 1 base cheese, then 1.5 base cheese then 2 base cheese etc untill you're hitting optimal timings.
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