Idk about valentine day but for everyother x-day, I (used to) always-just make a card myself, it’s not hard tbh and really I think a homemade card might should be appreciated more
Some people don't attach value or sentimentality to $5 valentine's day cards and would rather just spend time with their partner and spending time picking out a good card for each other can be fun. I personally like the funny ones so it can be fun to pick those out, show them to your partner, have a laugh together, and then put them back. The card brings the same amount of joy, but you don't have to spend money or throw it away later.