No why was it completely unacceptable?
The very first thing is that no where in the commercial world will you see a CEO grab a female employee and take hold of her head and kiss her on the lips when celebrating anything, be it a lawyers court case win, a successful difficult surgery, a company takeover, a big sales success. Its just unprofessional.
The next thing which is a major one is the very clear and obvious power imbalance. Grassroots staff find it very difficult to push back against people in positions above them, positions of power and authority. Fear of reprisals, fear of job loss fear of being seen to be difficult mean people at the bottom end of the ladder are at a disadvantage. Those at the top need to act impeccably to set a standard and level of professionalism for very obvious reasons. Women are especially vulnerable in these power imbalance situations.
Another thing is the responsibility of a higher position to the overall leadership of an institution, acting in a manner unbecoming of a leader erodes faith and trust in a leadership. How can those at the bottom trust those at the top if those at the top take liberties. Its a bit like how we expect the Police to be squeaky clean because we need to trust the police are held to the same laws we are .
Women have for far too long had to simply accept and endure poor behaviour from men. There is a long long history of women being treated badly in the workplace, in the home in society in general.
You keep trying to minimise it because you perceive that she wasnt surprised or offended at the time. She had just won the world cup so of course she was going to be smiling and laughing. Soon after when interviewed on tv she very clearly states she didnt like it. I really dont understand why you keep doubling down on this one thing. I wonder how you would feel if she was your wife and the head of the FA grabbed her head and kissed her on the lips. Its not the worlds most heinous crime but its highly inappropriate.
The very thing you are talking about, the accusations of sexual misconduct are why men in positions of power need to be even more respectful more thoughtful in their conduct. We have to make sure we are clear of the suspicion of inappropriate behaviour because its the right thing to do.
Leaders have an influence on how others act.
I coached girls and women for years, I had to make sure I was squeaky clean in how I behaved and what i said. I had to do that so the women players and girls trusted me and they were comfortable working with me but mostly because they simply didnt deserve to have to deal with someone creepy or sexist. Also the dangers of perceptions of player favouritism come in to play.