l can’t answer the debate on blank test records, but what you observe with scratching the surface when using one is quite normal.
Even if you are tracking at 1 - 2 grams will leave traces from the stylus on the virgin flat vinyl. Don’t listen to any nonsense about your tracking weight being wrong. @cleeds “That sounds unlikely” “What the heck are you using for VTF?” is misinforming you. A stylus never tracks the absolute bottom of the groove. It rides on the modulations on each side of the groove. The tracking force is spread over a wider area of the stylus profile, and not to the tip of the stylus when playing a record.
The reason you have noticed (and quite correctly) the scarring on the test record is because the full tracking force is applied to the tip of the stylus. No force is imparted to the sides of a groove as there is non present. Anyone who has ever had a test record with a test band for bias (anti-skate) adjustment can tell you marks are left after playing.
l would suggest using the test band to get a rough average setting. Then use the advice given by @lewm to fine tune your arm and cartridge. Different stylus profiles can change the results you will get with your test record, so use your ears for the minute tweaks.