N concurrent API calls / queries is faster than N conditions inside of $or

Working with Data
, ,
1

N conditions in $or query:

await db.user.aggregate([
  { $match: {
      $or: [ { A_1: "some_value" }, { A_2: "some_value" }, { A_N: "some_value" } ]
  } },
])

N concurrent queries

await Promise.all([
  await db.user.aggregate([
  { $match: {
      A_1: "some_value" 
  } },
]),
 await db.user.aggregate([
  { $match: {
     A_2: "some_value"
  } },
]),
 await db.user.aggregate([
  { $match: {
     A_N: "some_value"
  } },
])
])

The later strategy has been tested repeatedly to be significantly faster than the first strategy against a collection with 100k documents. In the real use case, there 10s of conditions within each $or.

Is this expected behavior?
Is there no way to get the one-query strategy to be at least just as fast?