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Physics is awesome

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So my question here the unit of force "accepted" as to whatever it is based on satisfying the force equation?

So basically here is a simple question, "How much force is needed to accelerate a 50 kg mass @ 14 m/s². Simple equation 50 x 14= 700 N

Now what is 700 N? 700 N is the force applied to the 50 kg mass to accelerate it at 14 m/s². So we are back to just stating its the force that accelerates an object at a specified acceleration with a specified mass.

Now, We can take 700 N / 9.8/ms² to get the equivalent force on a mass being pulled in by gravity on the surface of the Earth which equals =71.42 kg and we can covert kg to pounds by dividing by .4535 = 157.49 pounds of force.

So now back to my question is what actually really determines true net force. What if gravity was 2x the force so everything that weighs 100 pounds is now equal 200 pounds of force. What if gravity was still 9.8/ms² but outputted double the gravitational pull on matter. This wouldn't throw off our equation to determine force based on acceleration x mass. We would still have units of acceleration and mass and force , but for example to satisfy Newtons law that would mean if 9.8/ms² doubled force it would also apply for the force of any acceleration , so for example 4 m/s² would have double the amount of net force on an mass if our constant gravity was doubled from what we currently know it as(in order to satisfy Newtons law), a but it still remained at 9.8. So basically what I am asking is if everything with force is based off Newtons law and a Newton is defined as 1 kg accelerating a 1 m/s² do we just accept whatever this net force is? Which then brings me to the next question as why is the net force what it is? SO if we ask why is 1 Newton = .22 pounds of force. The only way we have to answer this question is base it off Newtons formula and comparing it to the current force of gravity on matter on earth. So is this just accepted? If gravity was putting out double the force at the same acceleration speed would this be the new norm for physics? Would we just accept it as long as it satisfies Newtons law?

Just pretend it took100 pounds of force to accelerate the mass of a spec of dust at 1 m/s². This then according to Newtons law of force would mean a spec of dust would weigh 5.06 pounds assuming gravitiy acceleration was still 9.8 ms². Would these numbers just be "accepted" because it satisfies the equation (and assume we as humans were put on the planet like this not knowing of gravity being any other way).