Seems like a reasonable enough objection, let’s see what we get focusing just on R movies.
90M nowadays is good for 5th:
1
Deadpool
Fox
$132,434,639
36.5%
3,558
$37,222
$363,070,709
2/12/16
2
Deadpool 2
Fox
$125,507,153
39.4%
4,349
$28,859
$318,491,426
5/18/18
3
It
WB (NL)
$123,403,419
37.7%
4,103
$30,076
$327,481,748
9/8/17
4
The Matrix Reloaded
WB
$91,774,413
32.6%
3,603
$25,471
$281,576,461
5/15/03
5
American Sniper
WB
$89,269,066
25.5%
3,555
$25,111
$350,126,372
1/16/15
A decade ago 5th was...
1
The Matrix Reloaded
WB
$91,774,413
32.6%
3,603
$25,471
$281,576,461
5/15/03
2
The Passion of the Christ
NM
$83,848,082
22.6%
3,043
$27,554
$370,274,604
2/25/04
3
300
WB
$70,885,301
33.7%
3,103
$22,844
$210,614,939
3/9/07
4
Hannibal
MGM
$58,003,121
35.1%
3,230
$17,957
$165,092,268
2/9/01
5
Sex and the City
WB (NL)
$57,038,404
37.4%
3,285
$17,363
$152,647,258
5/30/08
57-58M. It’s really not a substantially different picture here in terms of all OWs vs R opening weekends.