I think he is confusing frequency and bandwidth. You don’t “get more flow” from using a 5 ghz device instead of a 2.4 ghz device... they are just different ranges.
Your bandwidth and upload / download is determined by your ISP and the equipment between you and the nearest switch.
True. I don’t think I have ever seen anything over 100 mbs out of a home router. Bandwidth is one of the most misunderstood words there is, if I got 1000 mbs cable but someone is only uploading at 56 k that’s what I get on my end LMAO!