Yeah, the centralization of public Internet infrastructure around Cloud flare has been concerning, not only as a single point of failure but also in terms of consolidation of trust.
As a prior student workout a public IP deep behind several NATs, with little funds for self hosting hobbies, these kinds of tunnel services were a handy gateway in getting started.
Although, I hope ISP adoption of IPv6 or cheaper bandwidth quotas for VPS providers help compete on this front for self hosting networking.