Eating plants directly is always going to be more efficient than eating lab grown meat which was fed on plants (because there are going to be waste products).
Eating plants directly is also healthier. Cancers, heart attacks, blood pressure issues… some very common health issues partly stem from humans in industrialized nations eating way too many animal products. Lab grown meat won’t magically be healthier.
There’s still a chance that lab-grown meat doesn’t pan out because it’s hard to scale up.
Lab grown meat is going to be high-tech for a while. This gives a lot of power to a few select companies. Lab-meat shoppers are going to be dependent on a few startups and eventually a few multinationals which have bought up the startups.
This also means prices are going to be dictated by this oligopoly of companies, most of which need to serve investors. Often that’s going to be tech investors who expect a lot of growth leading to a lot of profit.