The problem is that we don't live (or ride, or watch racing) in a world consisting of an undifferentiated soup of opinions, but in a world with real power relations which are both reflected and reinforced by representations, and in which ideas conflict and some prevail, and it matters which ones. Podium "girls" don't cause women's cycling to be disadvantaged in comparison to men's, and they don't cause men to subject women to unwanted sexual attention, but the Podium Girls convention arises from the same attitudes towards and beliefs about women that do cause these things. It's not about my view - it's a question of what podium girls mean, and whether it is possible to have a serious commitment to equality whilst simultaneously perpetuating such meanings. A male cyclist cannot pose with a podium "girl" without endorsing (inadvertently or otherwise) the idea that she is an ornament and accessory to his success, without appropriating her body as an object to be looked at and judged in the context of his power, without suggesting that she is part of the prize. It isn't optional or properly consensual on either side - it is expected that men who win races will participate in this ritual. So we are not talking about views, we are talking about the right for successful males to be symbolically awarded women as prizes, versus the right of women not to be demeaned and objectified for the benefit of men. There's simply no justification for it in any context which claims to value equality. You know this, which is why you would organise prize-giving differently. The Olympic ceremony, as you say, recognised this, so why should we not demand the same of professional cycling?
I'm not sure I understand your last point. Sexism describes the phenomenon that society is ordered in ways that systematically disadvantage women and confer advantage upon men. By definition it doesn't have a reverse or equivalent. I may be getting the wrong end of the stick...