incorrect, ASUS has several tiers of cards:
the 'Dual mini' series is their cheapest brand
'Dual OC' is next step up
TUF gaming is their 'mid range' brand
ROG Strix is their 'high end' brand
they stopped segregating the 'ROG' brand and 'Strix' brand in the GPU space a few generations ago and now it's just one brand for their highest tier cards type.
for the 30 series exclusively they partnered up with Noctua to make a custom air cooled 3080 which is unique to ASUS and the 30 series from Nvidia.
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i don't know how old you are but i have had dealings with gigabyte since the 90's, and every interaction has been a bad one, my first 'gaming pc' that i built for myself has a gigabyte motherboard which constantly had issues despite being sent for repair multiple times before i got rid of that system and built a new one from scratch, i have had gigabyte GPUs in the past that have also had issues, and as a company they have been consistently bad with both their product quality as well as their customer service, with thousands of well documented and well highlighted incidents over the decades now, the last of which was the known faulty power supplies that exploded upon tripping OCP, see the GN videos on the topic for full information, not just that but at the launch of the 30 series they had major problems with their Aorus branded cards and many instances of failed or misplaced RMA's, so no, it's not a hobby, it's based on historical and not so historical evidence, if that's unclear to you then that's a 'you issue' and nothing i can help you with.