Nothing wrong with having a nice bike. Just toys at the end of the day. It’s funny how much people buy into the weight thing though. Bumped into a guy a while back, freezing cold, waiting to be picked up because he didn’t have a spare tube. His reasoning for not having one, was that he needed all the help he could get given his extra body weight.
Now, to be fair, I think he was referring to lugging an entire saddle bag about, which I can understand. It’s nice to not have it. But it really is not going to make any difference to anyone even slightly overweight. It’s something that’s only going to be noticed by a bona fide racing snake.
The last thing you need to lose weight on is the bike. Because to an already heavy rider the returns are massively diminished. It’s a drop in the ocean. And a light rider will be fast on a heavy bike.
I ride a lot of hilly terrain. It’s up and down as far as the eye can see. And I go between 8kg road bike, and 12kg road bike (probably closer to 14kg when laden with bags, bottles, lights, etc). Do I notice the difference? Yes. There’s very much a perceived difference on steep climbs, 12% and above. Actual times are not massively different. And in relatively tame rolling terrain, it’s barely noticeable. In a 100 mile sportive, you might be talking a difference of 5 minutes. I still choose to ride the heavy bike for some sportives, even if I plan on going flat out. It’s only a game change if you plan on taking it very seriously!
I also dropped about 3 stone from my bodyweight. Went from a fit fatty who could keep up on the flat, only to get dropped on every climb, to right on the line on my BMI, and the difference is night and day. Massive. I was beating PRs on Strava well under my threshold. And smashing them while on it. It’s only now that I feel small fluctuations in weight. A few years back I could’ve towed a trailer full of bricks and not noticed it.