How is wmt and cost growth sustainable?

Wmt and cost have extremely high valuations and low growth. Having a 45 and 52 P/E ratio respectively and growing around 5-7%. Despite this, they have more than doubled the sp500 returns and beat 5 out of the mag 7 comfortably in the same time frame. This is also during a bull run period with only 2022 being a negative year. 5 year returns Cost: 187% Msft: 66.5% Wmt: 190% Meta: 144.6% Amzn: 22.3% Appl: 96.9% Spy: 74.9% Wmt and cost seem to have this permanent bull case where they will go up with the general market but also act as a safe haven during market uncertainty. They are up nearly 20% ytd already with the Nasdaq being red ytd. I get that Wmt and cost deserve a premium because they probably will be around forever but surely their premium is too high and unsustainable.