MouldImagine a world where you're 1-0 up on badlands. Would you hold for 20 minutes on their spire for a thousand pounds?
I suppose with this you mean that that defensive and slow playstyle would prevail if players at the highest level of competitive TF2 were playing not only for fun, but also for money. I personally think this statement is wrong. In a world where that is the reality and top level teams but play to win and only to win
In reality the only reason a very slow and methodical playstyle of keeping a lead and forcing mistakes is considered the strongest is that there is literally no incentive for top teams to put in the amount of hours a proper csgo/dota/ow team does. IMO there are a lot of undiscovered options within the game already that can easily shake up the current meta and break a slow and defensive team (different banners, offclasses and unlocks). Not all of these options in all the possible combinations have been tried by top level teams and not in the scale necessary to find the best synergies and formulate strategies. If there was a reason for the best tf2 teams to put in as much time as cs teams then they would try all of these, otherwise they would have to give up the game after losing the first round with the enemy parked in a defensive hold and I'm sure they would find new playstyles that work even better than what is considered the strongest now. There is a reason i49 Epsilon is considered the best team of all time. Credit is due to Kaidus here, because a lot of my thoughts have been sparked by his opinions and what he has said on his stream in the past.
Despite my view on the above subject i have to agree with Hildreth though, a renaissance of competitive tf2 will never happen, it will remain a grassroots esport as there isn't a half-decent base for a successful esport for valve to invest into.
That said I'm happy to keep playing the game i have loved playing for the past few years with the ruleset we have come up with until the game eventually dies off completely. The only chance for a competitive Team Fortress IMO is a sequel built with competitive in mind, a state of the art game engine (at least source 2), a lot of hype around launch and an infrastructure in place to funnel players into competitive from the start. No casual stigma, no horrible performance, attractive visuals (not for comp players, but there is a target group that judges games by their looks) and devs that play the game actively. We have absolutely no way to predict the probability of this happening and if it will then only far in the future but it would be a missed opportunity for valve not to create it. If they don't I'll be sad but I'll find something else.