Yeah, as these kind folks said, you should focus the training on what you want your plants to develop like, and fill your grow space. LST is used to "hold back" apical growth, sending plant hormones to ancillary branches, causing shorter, bushier plants with more of a main "header" for branches than the typical Christmas tree growth. This can also be accomplished with sprouted seed and kelp teas that contain cytokinins, which hormonally drives the plant for stout, bushy growth. Topping and FIM also do this, but are best for plants that you're trying to grow BIG, imo, due the recovery and veg time that it takes to really maximize the effects, at least from seed, anyway. I'm pretty much always a fan of schwazzing and supercropping.
For example, I have a specific footprint in my grow tent that I can fill, and I only grow photoperiod seeds, so assuming a 50/50 female ratio, I can train the plants based on how many females I have after culling the males. If I end up with more than expected, it will be taller plants that I will flower ASAP, and if I end up with less than expected, I'll train and veg a little more to fill out the space. The yield you strive for is based on the height and width of canopy and your lamp strength, rather than the number of plants.
You know, I once heard an old baseball saying, that a good manager never wins any games for the team; they just prevent as many losses as possible. I feel like this is a good way to look at growing cannabis plants once they start flowering. Getting too handsy or extra usually does more harm than good. Give the plants what they need, no more, no less, and keep a close eye and a distant hand.