Did you exclude the electricity price from your number? As per mining calculator, with s19 pro and electricity price like 0,06$ per KWh (which is a low price) you will earn 17,5$ daily. So even with low electricity price it requires 1,5 years of non-stop work (may be longer if you consider halving) of s19 pro that costs 9,5$k + probably some other expenses.
So generally, OP is right. According to mining calculators, purchase of asic miner would pay off in about 2 years depending on your electricity price.
Right now, crypto mining is not a free money. For single individuals mining profitability depends on upcoming BTC price. If it rallies anytime soon then your purchase pays off faster.
Yeah, agree if you have a high electricity rate the ROI will be more than 1year. Unless you have free electricity from solar or wind turbines.
My calculation is from the total income calculated from asicminervalue.com which excludes the electricity rate but right now the total income for 1 year is changed due to an increase in difficulty and the price of Bitcoin.
So the ROI depends on the price of Bitcoin, Electricity rate, and difficulty and I think extra expenses like maintenance.
Adding this tool how long you will reach your ROI I tested it and the calculation is more than 2.5 years.
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https://www.mycryptobuddy.com/BitcoinMiningCalculator