Presumably then, you also understand the difference (other than the $$$$) between using UV vs a Mass Specific detector or a triple quad to detect ones analyte of interest?
OP said nothing about LC-MS/MS.
My guess is they’re doing their due diligence and setting up an HPLC with a DAD for In House analytics
Simple solvent extraction and filtration will get them plenty close enough for that.
I totally agree that running a 3rd party lab, with on the job trained technicians, using a prep kit (Quenchers) as part of your validated method makes great sense.
I also agree with @anon81723932 that it’s not necessary in OP’s case.