What a bullshit statement that has no basis in reality. I wish high-visibility "thought leaders" would stop spewing this bullshit (but they won't)
Safari is definitely not choking the web platform to death. It's as lively as ever.
What you want is a bunch of Chrome-only non-standards that both Safari and Mozilla vehemently oppose to, and a smattering of other bullshit features under the PWA banner that are coming to the next versions of Safari.
Android and Windows make up four times the number of web users as iOS. That's almost the same ratio (Chrome:others) as browser use across the web. Get a significant proportion of those user to move onto to other browser platforms first, then go after Apple give the final 20% of users more choice.
(based on stats from here: https://en.wikipedia.org/wiki/Usage_share_of_operating_syste... )