Bash script returning whole array instead of single element

I wanted to make a CLI tool that will display a random quote (from a list of .sh scripts which show ANSI art along with said quote) and also let you filter by author.

It works fine when I pick an author and it has only 1 option to choose from, but once I try to randomize from multiple outputs, it acts weird. Here's the code

#!/usr/bin/env bash

# Variables
author=$1
quoteFiles=()
numberFiles=""

# Functions
findQuotes() {
    # Save all paths for available quotes to array & filter by name. 
    readarray -d '' quoteFiles < <(find ~/quotes -name "*.sh" | grep "$author")

    # Grab number  of quotes.
    local foundNum=$(find ~/quotes -name "*.sh" | grep "$author" | wc -l)
    numberFiles=$foundNum
}

main() {
    # Run function to save file paths to array & assign number of file paths to variable for checking
    findQuotes
    
    # Make random number between 1 and the total number of files.
    randomNum=$(shuf -i 1-"$numberFiles" -n 1)
    
    # Check if random number == line number, if it is: print that quote
    for line in $(seq 1 $numberFiles) 
    do
        echo $randomNum # TESTING PURPOSES REMOVE AFTER
        echo $line # same
        echo $quoteFiles[$line] # same

        # Check if this array element corresponds with random number
         #if [[ $line -eq $randomNum  ]]
         #then
            # Run the specific sh script it found with a quote
         #  bash $quoteFiles[$line]
        # fi
    done
}

main

The issue seems to be with the array I'm making, since the test echo I made (echo $quoteFiles[$line] # same) prints all the elements and not just the one at that specific index. Here's the full response:

$ ./quoter  

3
1
/Users/petal/quotes/bourdieu/education.sh /Users/petal/quotes/marx/fish.sh /Users/petal/quotes/seeger/side.sh [1]
3
2
/Users/petal/quotes/bourdieu/education.sh /Users/petal/quotes/marx/fish.sh /Users/petal/quotes/seeger/side.sh [2]
3
3
/Users/petal/quotes/bourdieu/education.sh /Users/petal/quotes/marx/fish.sh /Users/petal/quotes/seeger/side.sh [3]

I don't know what I'm doing wrong in making the array.