No, that would leave 8 league titles from Messi vs 5 from Ronaldo.
Also, using that logic, we can also count out 2016 EC win for Ronaldo as the cup was literally won by Eder and his co in Portugal defense. That would leave Ronaldo trophyless with Portugal.
Not really the same logic, you are totally wrong here.. Ronaldo did played a major part in 2016 EC (top goalscorer and top assist for Portugal, over 90% of game time, he was Portugal key player in EC, won silver boot in EC, and was in team of tournament), and of course all the league titles win too.
Here's the detail summary of league titles won and his overall involvement highlighted:
League titles (won 7 league titles as major key player and best player/top scorer of the team/league)
06-07 - 17 goals in 34 games (out of 38) winning PL (count, 2nd in Ballon D'or))
07-08 - 31 goals in 34 games (out of 38) winning PL (count, 1st in Ballon D'or))
08-09 - 18 goals in 33 games (out of 38) winning PL (count, 2nd in Ballon D'or)
11-12 - 46 goals in 38 games (out of 38) winning LL (count, 2nd in Ballon D'or)
16-17 - 25 goals in 29 games (out of 38) winning LL (count, 1st in Ballon D'or)
18-19 - 21 goals in 31 games (out of 38) winning Serie A (count, 3rd in Ballon D'or)
19-20 - 31 goals in 33 games (out of 38) winning Serie A (count, best player in serie A, Ballon D'or suspend for a year due to COVID)
Champions league (won 5 CL as major key player and best player/top scorer of the team/tournament)
07-08 - 8 goals in 11 games (out of 13) winning CL (count, 1st in Ballon D'or)
13-14 - 17 goals in 11 games (out of 13) winning CL (count, 1st in Ballon D'or)
15-16 - 16 gaols in 12 games (out of 13) winning CL (count, 1st in Ballon D'or)
16-17 - 12 goals in 13 games (out of 13) winning CL (count, 1st in Ballon D'or)
17-18 - 15 goals in 13 games (out of 13) winning CL (count, 2nd in Ballon D'or)
Euro (won 1 EC as major key player and best impact player of the team, won silver boot and was in team of tournament)
16: 3 goals 3 assists in 7 games (out of 7) (count, 1st in Ballon D'or)
Hence 7 league tiles, 5 CL and 1 Euro should all be counted for Ronaldo in terms of major involvement.
And to keep this short, using the same logic, this is the titles which I don't think should be counted for Messi:
League titles
04-05: 1 goals in 7 ganes (out of 38, less than half) (should not be counted, bit part role in sub only, league was won by Ronaldinho and co, no individual honours for Messi)
05-06: 6 goals in 17 games (out of 38, less than half) (minor involvement, should not be count for comparison purpose, as he didn't even play half of the games for the season and his overall contribution has been minor, league title was won by Ronaldinho and co, no individual honours for Messi)
CL
05-06: 1 goals in 6 games (out of 13, less than half) (minor involvement, did not feature in 90% of games in knockout stage, winning CL including progression in knockout stages has almost nothing to do with him, CL was won by Ronaldinho and co, no individual honours for Messi)
Hence 8 league titles, 3 CL and 1 Copa should be counted for Messi in terms of major involvement.