Based on present day costs, what you suggest may be true, but realistically no one changes the size of their fuel tank or battery when they tow. They have to pick the vehicle to meet their expectations from the outset.
Regardless of the fuel type the energy efficiency of any vehicle will reduce when towing necessitating more frequent top ups.
The differences between the initial purchase cost of ICE and equivalent EV's continues to be excessive, but it has been reducing, and as new developments come to fruition the cost of EV's will normalise and possibly even fall below ICE costs.
But even with the present premium on EV's you cannot make a fair direct comparison based on purchase price alone, becasue, you have to factor in the fuel and servicing and other ownership costs over the life of the vehicle. EV's have lower operating costs compared to equivalent ICE vehicles. Fuel, servicing, and wear and tear consumables are all lower cost for EV's meaning that over the whole life of an EV's, even on today's values, do work out cheaper to own, and you get the benefit of lower impact on the environment.
Because of the massive investment in research and development of new products by all sorts of manufacturers, all the indications are that EV whole life costs will continue to fall making EV's even more attractive as time goes on.
But I do agree the present day cost of battery capacity is prohibitive for owners, and the idea of spending more now to save even more later is sometimes difficult to see or fund.
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