Agree but but need to take a measured approach
If ownself grind, then need to also take actions to keep beans fresh also
Coffee in whole bean state last many times longer than coffee already in powdered form because the powder has much larger surface to oxidise.
U buy coffee in coffee beans, 2 months later also taste better than one that was already ground just 1 week ago.
If you use 10g for making one cup, 1kg $32, per cup is only 32c of 100 pct pure coffee which you can drink with assurance.
Actually i found a trick with my espresso machine.
I go freeze the espressos into cubes.
I one shot ask my helper make 1 week of supply.
The espresso cube instantly dissolve in water then mix with water becomes americano, taste exactly the same as fresh, the sweetness and delicate flowery notes all maintained.
Another way for people who wants to make coffee easy, is buy those big infuser, you throw inside the fridge with the powder to infuse for 1 day, abit more bitter but can control.
Just go Taobao buy a good grinders can liao, you will earn the grinder back within a year for most.