Most of those quality and gun specific cleaners ARE garage experiments. Many are grossly overrated and seriously overpriced for what they are.
I dunno about MOST, but I agree with you.
Up until now, all I ever used for cleaning and lubing my guns for 25 years:
Military Surplus (1969) "Rifle Bore Cleaner "MIL-C-372B"
Military Surplus "Weapons Oil, Light"
And more recently maybe a little Amsoil grease and Amsoil MP.
My guns look pretty nice.