Regardless, the settings exist, at least in most of the games......
Complete and utter bullshit.
Only settings that exist for online casino games (by any reputable software platform, and the market is dominated by reputable software platforms), are the same that exist for land-based casinos.
For example, in Blackjack they can choose how many decks to use in the shoe, how much penetration is allowed before reshuffling, whether do use continuous shuffling (which almost everyone does, but so do many Vegas blackjack tables nowadays), whether to stand split aces, whether dealer hits or stands on soft 17, etc.
Slot machines they may be able to pick the payout %. e.g. 98%, 95%, 92%, the progressive jackpot seed, etc. So can a land-based casino. This is just the expected value based on the virtual reel-stops and payout table, not any convoluted software algorithm.
Video Poker machines, too you have different EV payouts based on the payout table. The payout table is publicly displayed, you can do the math yourself, nothing secret at all. Go to WizardOfOdds.com and he's done the math already on most common payout tables.
Casino games were invented and designed with a house edge over time by their rules, probabilities and payouts; and players still like to play because there is high variance from the expected value-- i.e. you get lucky. No reason at all for any software implementation to fuck around with the tried and true nature of the games.
Online games in fact have better payouts and lower rake than most land-based casinos. They can afford it with lower overhead costs.