I'm sure I'm not the only one here who feels this way but bloom booster have the chance to cause more harm than good imo.
Can cause a full lockout is someone doesn't know what they are doing with them.
I've been there and done that with not so happy results. In fact year after year I try it on one plant and each time I lockout P. Plant leaves go purple.
measuring ppm is important and knowing your plants is key. i stay away from some 'stronger' boosters as you said they can cause problems.
it all depends what youre feeding them. i use a line of nutes so they are designed to work together. once you start mix matching nutes is where you can run into issues eg
a nute line with a 3part and bloom booster
the booster maybe. 0-2-3 (just an example) but they tell you to add double the amount of the 'bloom'.
now switch that booster with like 0 20 40 and you will run into issues for sure.
for me personally i just like to run with a full nute line. i get them cheap and even if i didnt the money isnt a factor. id rather spend 100-200 on nutes and yeild 3lbs then buy that weed for 2000 a p anyways. plus i know its been designed to use as per instructed. no guessing games
but thats just me and the way i like to grow. there's many ways and whatever works best for your situation i say is just fine.