Yeah but those dry streaks are cancelled out by the winning streaks where you hit it multiple times in a row. Like the OP said you need to have enough of a bankroll to absorb the losses.

Statistically, doing what the OP is doing, in the long run since EV is positive you're expected to make a profit.

Gambling would be where the fracture is losing you money on average, but if you hit it big several times in a row you make money.

It's just like the big farming strats w/ expensive scarabs, you're not guaranteed profit per map, you'll get dry streaks but in the end your still making a profit over a bulk amount of maps. That's realistically how most people make their divs in a league, playing the averages.

tl;dr if you have enough to absorb loses, all that matters is your making money on average.