I'm reluctant to conclude too much about a new landscape of opportunity until I see FIFA's investment and that from the large European clubs and how that impacts younger women/girl players. Even the fact that we see teenage girls going pro - the world is a big place with lots of players. Even a handful of pros doesn't really indicate a trend to me. If playing professionally becomes a viable path for more than just a couple of players now and again, say a path for a group that is (in numbers) akin to 2 full squads of players and playing professionally becomes a viable career path (w/o having to worry about big endorsement dollars), then I will say, "yes, there is a change." Others may feel differently.
With respect to high school - I am sure that my kid is not terribly unique among the kids of people on this board (though I think this is less common in NorCal and more common in SoCal). She does not play in her home community - she commutes to practice and games and while she has great bonds with her club teammates and I consider their parents among my good friends, she is not playing with her social friends, with her community. Playing HS is a different experience - she's playing with girls she's played with and against since the micro rec days when they played 4v4 with no GK. She's part of a HS community that does support its athletes - sometimes that means going out to the games and sometimes it means people high fiving in the hallways or a teacher or support staff person making a comment to her about a recent result or hearing she had been named to this team or that. Younger girls might see her doing a private workout and think, "oh, when I get to HS, I'm going to work like that. I can't wait to be a _____". She and her club teammates play at a high level and give up a lot - like all of your players do - to achieve what they have achieved. All the kids have missed birthday parties and dances and other parties and short trips with friends. A bit of all of that does happen during the HS season.
The elite among the elite teen players are still teens. They do need to be kids and grow to be adults. Their paths may differ but athlete after athlete has shown that that path, even for the elite among the elite, CAN include HS. If a player will suffer so much by taking 3 or 4 months off to play HS, I sure hope that player never gets injured, has a personal tragedy, feels any temporary burnout. If a kid can't take a break w/o the path getting swept away, I worry about that player. (to be clear, if a player CHOOSES not to play, CHOOSES to not take breaks, etc., etc., etc., I am quite supportive because that is the player's CHOICE).