Basic JavaScript - Record Collection

JavaScript
15

Today I went to see hints and got 90% of it

function updateRecords(records, id, prop, value) {
  if(value === '')
    delete records[id][prop];
  if(prop !== 'tracks' && value !== ''){
    records[id][prop] = value
  }
  if(prop == 'tracks' && value !==''){
    if(!records[id].hasOwnProperty('tracks')){
      records[id]['tracks'] = [];
      records[id]['tracks'].push(value);
    }
  }
  return records;
}

What shocks me most, why I was making it so complex like if(records[id][props] === value) thinking it will check if(records[id][props] === ''). My question now would be, why people like me make it so complated and is it normal, what is best way to approach a problem especially complex one.