Yes, as you said, the calendar of the SharePoint online modern site is essentially a list, and there is no way to synchronize it with the outlook calendar.
It is recommended that you use calendar app:
Click New-->App on the SharePoint site home page.
Click on classic experience.
Enter calendar to create an event list:
And, to address your concern about the situation, we’d suggest you go to feedback on this issue, this is the best platform to let us hear from you and make our products and services better for you and others. Microsoft values its customer feedback and a lot of features have been developed and suggested by customers via feedback. Your feedback is also very important. I am sure SharePoint developers are working on this. Our Product Team is in-charge of the site and they are constantly checking the comments and feedback from our customers.
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