If we wait for 7,8,9 then we miss on potential EC profits during spins 1-6.
If we bet on single numbers only too soon then there is more chance we will reach the table limits on our way towards spin 25 (worse case scenario) - but by betting the official areas of the carpet we give ourselves insurance cover along the way - so we have a chance of coming face to face with spin 25 as a guaranteed winner instead of waiting around maybe days for 25 individual numbers to appear virtually (it might hit on spin 19). And we have pocketed bits and pieces of profit along the way, including all repeated numbers - possibly a couple of zeroes as well since it's covered at all times.
If we bet on single numbers only too soon then there is more chance we will reach the table limits on our way towards spin 25 (worse case scenario) - but by betting the official areas of the carpet we give ourselves insurance cover along the way - so we have a chance of coming face to face with spin 25 as a guaranteed winner instead of waiting around maybe days for 25 individual numbers to appear virtually (it might hit on spin 19). And we have pocketed bits and pieces of profit along the way, including all repeated numbers - possibly a couple of zeroes as well since it's covered at all times.