You might want to go back and re-calculate. Pre-covid, I did a comparison between in-store, Instacart, and Shipt. I did my normal groceries in store, then took the receipt and re-created it in Instacart and Shipt. It wasn't just the delivery fee + tip. Shipt and Instacart both increased the prices of each individual item; sometimes by a lot. IIRC the total was about 12% more BEFORE taxes, fees and tips. On a $150 shop, it was considerable. This was a while ago and things may have changed, but its worth looking into. You don't even need an in-store receipt; just download your store's weekly flyer and compare those prices with Shipt's and Instacart's.

Also noteworthy: Shipt didn't respect any of my store's B1G1 offers. It didn't even appear in their system while shopping (Instacart did). I actually know a Shipt shopper that was getting free stuff all the time because of this.

If you're strapped for time but still want to stay safe and save money, consider stores that have curb side service like Wal-Mart. You get in store prices with no extra fees and no-contact hand off.