Are you a film fan? Have you ever seen Braveheart? Pearl Harbour? Gravity? Interstellar? Bohemian Rhapsody?
What all these films (and a massive amount more) have in common is they get stuff wrong. History. Science - hard and theoretical. Even their own internal continuity.
Filmmakers often get things wrong. That's just a cold, hard fact.
The production team of 'Flash' can follow whatever the hell rules they like.
Doesn't mean they're getting it right.
The only way to settle this is for both of you to time travel and report back what you discover. If you must disrupt my timeline please give me superspeed and I will be the alternate RF who is good, brave and benelovent . . .