Flash has security issues and is a massive energy hog. The comparison doesn't work - offering flash hurts all users. Offering a port does not harm those who are all-in on wireless, it doesn't harm anyone.
Apple is attempting to sell wireless headphones. Customers like wireless headphones and have been buying them long before Apple removed the port. The problem is that wireless isn't a solution for a long list of use cases, mainstream uses cases. No amount of 'nudging third parties' will fix for that. It's an insulting effort, an attempt to tell me that if I endure X amount of pain I get a solution to the problem of Y (note: Y never bothered me).
You can sell wireless headphones while also supporting wired. One does not replace the other; the inherent nature of wireless means that certain trade offs will always exist. They will always have a battery. They will always be more complicated, electronically, than normal, passive 3.55 headphones. They address different use cases. Normal headphones are simple and work all of the time. Wireless headphones do away with the cable, allowing more freedom of movement. But they require charging, add latency and are heavier on account of the battery.
Stop carrying water, stop making absurd arguments. You can have a wireless future and also support users who are not served by that future. It's a port. The device has space for the port. Offer the port. Your argument reads like cult speak, just absolute nonsense with no factual ground.