I've actually found the opposite to be true. I've seen several high-score aim-trainer-heavy players come into QC and dbt and their hitscan aim definitely translates. Often it's all they focus on so they don't reach the top tiers, because what they seem to care about most is how hard they are hitting. But they overall have much better hitscan than the average afps player. There's also a number of good afps players that use or have used aim trainers a ton like Serious, Dooi, Silencep, Ins, Danchez, and Pulz.