Based upon your comments, it intends on what you want.
New car paint if properly delivered will have clean paint free of any marring (reduces gloss) and swirls (scratches in the paint). This is the showroom shine.
To maintain this shine, you have to prevent marring, swirls, and other environmental effects (water spots, airborne contaminants that get on the paint, etc). The showroom shine can be reduced is degraded by washing, drying, and the environment effects over time. There are accepted ways that minimize marring, swirls, etc. when washing/drying if properly done.
Here is one difference: Some people notice things more than others and others do not care about such things. This is why everyone debates waxes all the time. Beauty is in the eye of the beholder.
The best practices are: a ph neutral soap (dishwashing detergent is not), a good soft wash media (wool, boars head brush, etc), plenty of mixed soap (a separate rinse bucket is even better), microfiber towels for drying. etc. These are all outlined at web sites like
www.mothers.com.
If you think you like your results, then why argue about it. Now the test is to get someone to look at your paint and assess whether there is marring and swirls since you may not be able to see them to judge whether your technique is causing damage or not.
My guess you have marring from using the bug scrubber but you just do not notice it. Again, if you think it looks good, then that is all that matters. It is when you want someone to agree with you that you have to accept other standards of good.