mutual infringements .. no
starts & restarts of play ... no
theres more & I'll think of them
so no, youre wrong
Section 16. Note on Rule 8 says:
The advantage law applies to all phases of play, but where a team infringes in a strong tactical position the advantage should be allowed only if the ball goes immediately into the possession of the non-offending team.
The referee is the sole judge of what constitutes an advantage be it tactical or territorial. An infringement is not 'negated' simply because the ball touches or is touched by an opponent. The opponent must have adequate opportunity to take advantage and must endeavour to do so before play is allowed to proceed.
Application of the advantage laws does not deprive the Referee of subsequently dealing with the offending player.
So tell me again why advantage could not have been played?
Your examples of areas where advantage is not applied is flawed. A mutual infringement by definition is where one team gains an unfair advantage from an irregularity not covered by the laws.
Regarding restarts of play, a penalty to the non-offending team is the most advantageous outcome 99% of the team. Eg. A player is in front of the kickoff. The Referee could either penalise at half way on the spot, or allow advantage and wait and see if the receiving team make a bust? Cmon of course the penalty is the better option