There's logic in these arguments; however, they ignore securities laws.

If BTC is a security, which the regulators probably think it is, then yes—you have to have a mechanism to bring concepts like splits, tenders, dividends to holders of the security if you are going to hold them for their benefit.

Developers considering forks will likely be required to follow yet unclarified rules around how much, how often, waiting and disclosure periods, etc.

(It's useful to consider how rules and systems have evolved governing how often Apple can split its stock or how Facebook investors are notified about tender offers, etc.)