You are correct that the cost to invest in a th of mining power in gomining would be more than setting up your own farm if you have the knowledge, skills and expertise like yourself. Not everyone is like you. Gomining brings bitcoin mining to the common everyday person by charging for their expertise. This does not make gomining a scam. It makes them entrepreneurs with a business focused on bring bitcoin mining to everyday people, decentralization at work.
With recent discounts you can buy 1 th of mining power for $17 usd. When you factor in the cost of asic, infrastructure and labour, this is a very reasonable cost and smaller initial investment.
Logical discourse is far preferred to name callling and judgements without data.
