Hate is a strong word- conflicting methods is more the reality.
TFPC methodologies base pool care on regular homeowner testing with an accurate kit more often than once per week & dosing as needed w/ a few simple fairly cheap Basic chemicals (liquid chlorine, baking soda, Muriatic acid, stabilizer, & calcium chloride) that really don’t make pool stores very much $$.
They are a business after all & do need to make $.
Average pool store/service methodologies are based on the test once a week & dose once a week whether u need it or not plan.
Pool Stores generally make most of their $ on expensive forms of chlorine & potions

that are simply not recommended here & often cause more harm than good in the long term. Especially when the user has no idea what is actually in the products or their full effects on their water chemistry.
The fact is that alot folks walk in looking for a magic pill & the pool store provides that to them based on the info they have at the time (like a water sample that’s been sitting in the car all day) whether it’s a good long term solution or not & the customer will likely not return for a week. They are just giving the customer what they want in the moment most of the time & it can be a vicious cycle. Unless the store sells plenty of other products/services with a higher profit margin than chemicals this will likely not change.
Outdated industry standards for recommended levels also play a large role in this equation. Things are starting to change but it’s slow going & the end user is caught in the middle, confused, & pays the price
More often than not people will come here after spending hundreds of dollars & doing every thing they were told by the PS only to still have an unswimmable unsanitary pool looking at them every day for an entire season. Many are shocked to learn that the recommended levels they were told to maintain are what got them in trouble in the 1st place.
Things like - a cya of 100 & a fc of 3 are perfect! Or that to lower TA they should add insane amounts of acid & crash their ph potentially damaging equipment, surfaces, & swimmers.
Unfortunately most pool stores (& by default their employees) do not fully recognize the fc/cya relationship as most are trained by the very companies that produce/distribute solid forms of chlorine & magic potions.
Pool stores have their place in tfpc but it’s not reliable/repeatable testing or magic potions.
I try to patronize my locally owned store for things like liquid chlorine, salt, the occasional pool part etc. but as nice as they are I don’t use their testing or ask for their chemistry advice. Until I got my own Taylor salinity kit I would occasionally get my salt level checked there to compare with my salt strips (they use a meter that may or may not be properly calibrated) but it was a level that could stand to be “in the ballpark”.
I know they don’t use/acknowledge tfp
Recommended Levels because the 1st couple times I had them test my water they did the full battery of tests & always said my fc was too high & proceded to recommend other chemicals as well even though my water was spot on.
They probably just think I’m the weird liquid chlorine lady

because i have a salt pool but I don’t buy their mps.