@The_real_cal_howard
I didn't use head canon multipliers. I specifically left out SSJG, limit breaks, zenkais etc due to not having their specific multipliers. I literally only used the accepted SSJ and KKx20, and said imo we could logically use Goku surpassing his SSJBkkx10 self with SSJB in his second fight with Hit as a 10x multiplier since it's kaioken based, which is accepted. The only one you could argue is any leap in logic is SSJB, which is outright stated to be SSJG going SSJ, so 50x is directly implied as well since it is literally SSJ (accepted as a 50x multiplier for speed) on top of SSJG. Even with this I noted people might be anal and want to dismiss it.
If there are official multipliers the wiki generally accepts them if they are explicit and or super obvious.
Also the Whis calc and the Beerus calc are fundamentally different in this context. The Whis calc could be any timeframe really below around 10 sec, with 10 sec being very conservative given his immediate arrival after the creation of the food, so really it could only be faster. Beerus one on the other hand at 30 sec is already conservative, it can't be a vastly longer timeframe given it was going to be an immediate destruction. So while the Whis feat is just as likely to be vastly beyond what it is currently calced at, the Beerus feat is highly unlikely to be much slower based on the context of the event.
In the long run though the bottom line is, the Whis feat timeframe is a complete guess, will get contradicted by any multipliers being applied no matter what if you use that timeframe, and could be any amount faster, and thus the 10 sec assumption of it is not a good way to try and put a cap on speed in DB. As for the multipliers, they are all based on Kaioken and SSJ which are both accepted as speed multipliers, and they are conservative, so I see no issue with applying them, especially since the argument that Whis is slower is fallacious given we don't actually know how fast he is, there is just a low ball estimate that could be off by any unknown magnitude.